Issue 15, 2023
From the journal:

RSC Advances

Exfoliated graphite with spinel oxide as an effective hybrid electrocatalyst for water splitting†

Malgorzata Skorupska,a   Kinga Kowalska,a   Magdalena Tyc,a   Anna Ilnicka, ORCID logo *a   Mariusz Szkoda ORCID logo bc  and  Jerzy P. Lukaszewiczad  

* Corresponding authors

a Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland
E-mail: ailnicka@umk.pl

b Faculty of Chemistry, Department of Chemistry and Technology of Functional Materials, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland

c Advanced Materials Center, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland

d Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University in Torun, Wilenska 4, 87-100 Torun, Poland

Abstract

The aim of the conducted research was to develop hybrid nanostructures formed from MnCo2O4 and exfoliated graphite. Carbon added during the synthesis allowed for obtaining a well-distributed MnCo2O4 particle size with exposed active sites contributing to the increased electric conductivity. The influence of the weight ratios of carbon to a catalyst for hydrogen and oxygen evolution reactions was investigated. The new bifunctional catalysts for water splitting were tested in an alkaline medium with excellent electrochemical performance and very good working stability. The results for hybrid samples show better electrochemical performance compared to the pure MnCo2O4. The highest electrocatalytic activity was for sample MnCo2O4/EG (2/1), where the value of the overpotential was 1.66 V at 10 mA cm−2, and also for this sample a low value of Tafel slope (63 mV dec−1) was denoted.

Graphical abstract: Exfoliated graphite with spinel oxide as an effective hybrid electrocatalyst for water splitting

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Article information

DOI
https://doi.org/10.1039/D3RA00589E
Article type
Paper
Submitted
28 Jan 2023
Accepted
21 Mar 2023
First published
31 Mar 2023
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2023,13, 10215-10220

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Exfoliated graphite with spinel oxide as an effective hybrid electrocatalyst for water splitting

M. Skorupska, K. Kowalska, M. Tyc, A. Ilnicka, M. Szkoda and J. P. Lukaszewicz, RSC Adv., 2023, 13, 10215 DOI: 10.1039/D3RA00589E

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